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= 5-(-4) / -1-2
= 9/-3
= -3
bila garis sejajar, maka gradien garis akan sama
2x+6y = 12
6y = -2x +12
3(6y) = 3(-2x) + 3(12)
18y = -6x + 36
_________________ :2
9y = -3x + 18
jadi jawabannya yg C
maaf KL salah